As it happens, I have the exact same setup. The gm.solidpoint error is a bug. Thanks for pointing that out. I’m not able to reproduce the "I get jit.gl.material: doesn’t understand "generator" when I change either the Diffuse or Specular shading model" problem. Can you give the exact steps you take to make that happen? Does the output still seem to change appropriately even with the error?

I just open the patch and change the Diffuse shading model via the drop down menu, there is no visible effect whatsoever.
What is strange though is that when opening the material.io patch i don’t get these errors and the shader models are loaded in correctly.

Also: the gm.illumilines gm.normals and all the others in the shader folder give the same error as the gm.solidpoints, which I guess is consistent with the bug.